Seeds of South Australia
Carinavalva glauca (Cruciferae)
Beautiful Cress
List of species for Carinavalva
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Seed collecting:
August to October
Herbarium region:
Lake Eyre
NRM region:
South Australian Arid Lands
IBRA regions
Oodnadatta (STP02)Stony Plains
 Rare   (IUCN: RA d(ii))   [endemic to SA]
Macumba (STP05) 
 Rare   (IUCN: RA d(ii))   [endemic to SA]
Witjira (STP06) 
 Rare   (IUCN: RA d(ii))   [endemic to SA]
Baltana (STP07) 
 Rare   (IUCN: RA d(ii))   [endemic to SA]
Sturt Stony Desert (CHC02)Channel Country
 Rare   (IUCN: RA d(ii))   [endemic to SA]
RSCA map:
Regional Species Conservation Assessments per IBRA subregion. Please click the thumbnail map.
AVH map:
Australian distribution map (external link)
SA Census:
Census of South Australian plants (external link)     [genus Carinavalva]
Name derivation:
Carinavalva from the Latin 'carina' meaning keel and 'valva' meaning a valve; referring to the keeled valves of the silicula. Glauca from the Latin 'glaucus' meaning bluish; alluding to the appearance of the plant or the colour of the flowers. 
Distribution:
Endemic to South Australia and found in the north and north-east parts of the state, growing in flood out areas.
Status:
Native. Rare in South Australia.
Plant description:
Erect annual herb to 30 cm tall, glaucous and glabrous with leaves to 6 cm long, pinnatisect, with 3-6 pairs of pinnae. Sepals to 5 mm long and petals narrow-linear to lanceolate, to 15 mm long, green-yellow. 
Fruit type:
Pale brown, flattened ovoid capsule to 11 mm long and 6 mm wide.
Seed type:
Small orange-brown flat reniform seeds to 1 mm long and 0.7 mm wide.
Embryo type:
Bent.
Seed collecting:
Collect maturing capsules those turning pale brown with orange seeds inside. Be gentle with the pods as they split open easily.
Seed cleaning:
Place the capsules in a tray and cover with paper to prevent seeds from popping out and leave to dry for a week. Then rub the dried pods gently by hand to dislodge the seeds. Use a sieve to separate the unwanted material. Store the seeds with a desiccant such as dried silica beads or dry rice, in an air tight container in a cool and dry place.
Seed viability:
From two collections, the seed viability were high, at 100%.
Seed germination:
This species has physiological dormancy that need to be overcome for the seed to germinate.
Seeds stored:
LocationNo. of seeds
(weight grams)
Number
of plants
Date
collected
Collection number
Collection location
Date
stored
% ViabilityStorage
temperature
BGA 
MSB
6000 (1.21 g)
6000 (1.21 g)
50+25-Sep-2008DJD1114
Lake Eyre
20-Jul-2009100%-18°C
BGA226300 (37.5717 g)200+6-Sep-2013MJT446
Lake Eyre
24-Mar-2015100%-18°C
BGA122100 (20.27 g)DJD2712
Lake Eyre
24-Mar-2015100%-18°C
Location: BGA — the seeds are stored at the Adelaide Botanic Gardens, MSB — the seeds are stored at the Millennium Seed Bank, Kew, England.
Number of plants: This is the number of plants from which the seeds were collected.
Collection location: The Herbarium of South Australia's region name.
% Viability: Percentage of filled healthy seeds determined by a cut test or x-ray.
Germination table:
DateResultT0T50Pre-treatment | Germination medium | Incubator: Photoperiod / Thermoperiod
September 201446%9dNA Leach in RO water for 4 days; soak in 500 mg/L gibberellic acid for 48 hours
1% water agar
Incubated under winter conditions
September 20140%NANA None
1% water agar
Incubated under winter conditions
September 20140%NANA Leach in RO water for 4 days; soak in 100 mg/L potassium nitrate for 48 hours
1% water agar
Incubated under winter conditions
Result: Maximum percentage of germination observed.
T0: Number of days before first germinant observed.
T50: Number of days to achieve 50% germination.
Pre-treatment: The initial treatment that the seeds received prior to placement on germination media.
Germination medium: The substrate that seeds were placed on for the duration of the germination experiment.
Incubator conditions:
Photoperiod: The duration of light exposure that the seeds were subject to during a 24 hour period.
Thermoperiod: The constant or diurnal temperatures that seeds were subject to during a 24 hour period.
Winter conditions: 15°C 20 h (3am→11pm); 5°C 4 h (11pm→3am) / 10 h light (8am→6pm); 14 h dark (6pm→8am)
Spring/Autumn conditions: 22°C 12 h (8am→8pm); 10°C 12 h (8pm→8am) / 12 h light (8am→8pm); 12 h dark (8pm→8am)
Summer conditions: 30°C 14 h (6am→8pm); 15°C 10 h (8pm→6am) / 14 h light (6am→8pm); 10 h dark (8pm→6am)